Botrytis / Gray Mold Suspicion

Pest & Disease Profile · Fungal disease

Botrytis / Gray Mold Suspicion

Botrytis can infect damaged or senescing tissues and is especially concerning in dense flowering material. Internal decay may be present before the exterior looks severe.

What to observe

  • Localized browning, collapse, or soft decay inside flowers
  • Gray-brown sporulation under favorable conditions
  • Damage following prolonged wetness, condensation, injury, or dense flower development
  • Affected tissue that separates from healthy material abnormally

Common look-alikes

  • Normal late-stage browning
  • Mechanical injury
  • Caterpillar damage with secondary decay
  • Other fungal or bacterial rots

Evidence that improves confirmation

  • Inspect the interior of suspicious flower tissue carefully
  • Document wetness/condensation and progression
  • Use microscopy or laboratory testing when definitive identification is important

Risk context

  • Dense flowers can trap moisture
  • Rain, condensation, and prolonged high moisture increase risk
  • Wounded or senescing tissues can be vulnerable entry points

Management principles

  • Isolate affected material and avoid spreading spores/debris
  • Remove contaminated tissue according to site policy
  • Address moisture, condensation, and canopy airflow problems
  • Use lawful, crop-appropriate disease controls and protect post-harvest material from contaminated batches